Oligomeric metallocenes and their use

US6475947B1 · kind B1 · utility

Assignee

• Phillips Petroleum Company · US

Inventors

• Erik Licht · Bayreuth, DE
• Helmut G. Alt · Bayreuth, DE
• M. Bruce Welch · Bartlesville, US
• Bryan E. Hauger · Claremore, US

Key dates

• Filing date: Sep 10, 1999
• Grant date: Nov 5, 2002
• Expiry date: Sep 10, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing a new metallocene comprising reacting a first bridged metallocene which has an olefinically unsaturated with about two molar equivalents of an alkali metal alkyl, catalyst systems resulting from the combination of the resulting metallocenes and a cocatalyst, and polymerization processes using such catalyst systems are disclosed.